diff --git a/app/src/asset/anno.ts b/app/src/asset/anno.ts
index cad1fa580..b70afeaf0 100644
--- a/app/src/asset/anno.ts
+++ b/app/src/asset/anno.ts
@@ -8,6 +8,8 @@ import {Constants} from "../constants";
 import {Dialog} from "../dialog";
 import {showMessage} from "../dialog/message";
 import {isMobile} from "../util/functions";
+import {confirmDialog} from "../dialog/confirmDialog";
+import prettyBytes from "pretty-bytes";
 
 export const initAnno = (element: HTMLElement, pdf: any) => {
     getConfig(pdf);
@@ -738,13 +740,19 @@ const copyAnno = (idPath: string, fileName: string, pdf: any) => {
                 fetch(imageDataURL).then((response) => {
                     return response.blob();
                 }).then((blob) => {
-                    const formData = new FormData();
                     const imageName = content + ".png";
-                    formData.append("file[]", blob, imageName);
-                    formData.append("skipIfDuplicated", "true");
-                    fetchPost(Constants.UPLOAD_ADDRESS, formData, (response) => {
-                        writeText(`<<${idPath} "${content}">>
+                    let msg = "";
+                    if (Constants.SIZE_UPLOAD_TIP_SIZE <= blob.size) {
+                        msg = window.siyuan.languages.uploadFileTooLarge.replace("${x}", imageName).replace("${y}", prettyBytes(blob.size, {binary: true}));
+                    }
+                    confirmDialog(msg ? window.siyuan.languages.upload : "", msg, () => {
+                        const formData = new FormData();
+                        formData.append("file[]", blob, imageName);
+                        formData.append("skipIfDuplicated", "true");
+                        fetchPost(Constants.UPLOAD_ADDRESS, formData, (response) => {
+                            writeText(`<<${idPath} "${content}">>
 ![](${response.data.succMap[imageName]})`);
+                        });
                     });
                 });
             });
diff --git a/app/src/constants.ts b/app/src/constants.ts
index a5154561b..d14997e76 100644
--- a/app/src/constants.ts
+++ b/app/src/constants.ts
@@ -67,6 +67,7 @@ export abstract class Constants {
 
     // size
     public static readonly SIZE_DATABASE_MAZ_SIZE: number = 102400;
+    public static readonly SIZE_UPLOAD_TIP_SIZE: number = 256 * 1024 * 1024;
     public static readonly SIZE_SCROLL_TB: number = 24;
     public static readonly SIZE_SCROLL_STEP: number = 256;
     public static readonly SIZE_LINK_TEXT_MAX: number = 64;
diff --git a/app/src/protyle/render/av/asset.ts b/app/src/protyle/render/av/asset.ts
index db0dd4155..9955b475a 100644
--- a/app/src/protyle/render/av/asset.ts
+++ b/app/src/protyle/render/av/asset.ts
@@ -22,6 +22,8 @@ import * as dayjs from "dayjs";
 import {getColId} from "./col";
 import {getFieldIdByCellElement} from "./row";
 import {getCompressURL, removeCompressURL} from "../../../util/image";
+import {confirmDialog} from "../../../dialog/confirmDialog";
+import prettyBytes from "pretty-bytes";
 
 export const bindAssetEvent = (options: {
     protyle: IProtyle,
@@ -420,40 +422,51 @@ ${window.siyuan.languages.title}
     menu.element.querySelector("textarea").focus();
 };
 
-export const dragUpload = (files: string[], protyle: IProtyle, cellElement: HTMLElement) => {
-    const msgId = showMessage(window.siyuan.languages.uploading, 0);
-    fetchPost("/api/asset/insertLocalAssets", {
-        assetPaths: files,
-        isUpload: true,
-        id: protyle.block.rootID
-    }, (response) => {
-        const blockElement = hasClosestBlock(cellElement);
-        if (blockElement) {
-            hideMessage(msgId);
-            const addValue: IAVCellAssetValue[] = [];
-            Object.keys(response.data.succMap).forEach(key => {
-                const type = pathPosix().extname(key).toLowerCase();
-                const name = key.substring(0, key.length - type.length);
-                if (Constants.SIYUAN_ASSETS_IMAGE.includes(type)) {
-                    addValue.push({
-                        type: "image",
-                        name,
-                        content: response.data.succMap[key],
-                    });
-                } else {
-                    addValue.push({
-                        type: "file",
-                        name,
-                        content: response.data.succMap[key],
-                    });
-                }
-            });
-            updateAssetCell({
-                protyle,
-                blockElement,
-                cellElements: [cellElement],
-                addValue
-            });
+export const dragUpload = (files: ILocalFiles[], protyle: IProtyle, cellElement: HTMLElement) => {
+    let msg = "";
+    const assetPaths: string[] = [];
+    files.forEach(item => {
+        if (item.size && Constants.SIZE_UPLOAD_TIP_SIZE <= item.size) {
+            msg += window.siyuan.languages.uploadFileTooLarge.replace("${x}", item.path).replace("${y}", prettyBytes(item.size, {binary: true})) + "<br>";
         }
+        assetPaths.push(item.path);
+    });
+
+    confirmDialog(msg ? window.siyuan.languages.upload : "", msg, () => {
+        const msgId = showMessage(window.siyuan.languages.uploading, 0);
+        fetchPost("/api/asset/insertLocalAssets", {
+            assetPaths,
+            isUpload: true,
+            id: protyle.block.rootID
+        }, (response) => {
+            const blockElement = hasClosestBlock(cellElement);
+            if (blockElement) {
+                hideMessage(msgId);
+                const addValue: IAVCellAssetValue[] = [];
+                Object.keys(response.data.succMap).forEach(key => {
+                    const type = pathPosix().extname(key).toLowerCase();
+                    const name = key.substring(0, key.length - type.length);
+                    if (Constants.SIYUAN_ASSETS_IMAGE.includes(type)) {
+                        addValue.push({
+                            type: "image",
+                            name,
+                            content: response.data.succMap[key],
+                        });
+                    } else {
+                        addValue.push({
+                            type: "file",
+                            name,
+                            content: response.data.succMap[key],
+                        });
+                    }
+                });
+                updateAssetCell({
+                    protyle,
+                    blockElement,
+                    cellElements: [cellElement],
+                    addValue
+                });
+            }
+        });
     });
 };
diff --git a/app/src/protyle/render/av/blockAttr.ts b/app/src/protyle/render/av/blockAttr.ts
index 58920931e..5bc73d0f4 100644
--- a/app/src/protyle/render/av/blockAttr.ts
+++ b/app/src/protyle/render/av/blockAttr.ts
@@ -275,9 +275,12 @@ class="fn__flex-1 fn__flex${["url", "text", "number", "email", "phone", "block"]
                     const cellElement = element.querySelector(".custom-attr__avvalue--active") as HTMLElement;
                     if (cellElement) {
                         if (event.dataTransfer.types[0] === "Files" && !isBrowser()) {
-                            const files: string[] = [];
+                            const files: ILocalFiles[] = [];
                             for (let i = 0; i < event.dataTransfer.files.length; i++) {
-                                files.push(webUtils.getPathForFile(event.dataTransfer.files[i]));
+                                files.push({
+                                    path: webUtils.getPathForFile(event.dataTransfer.files[i]),
+                                    size: event.dataTransfer.files[i].size
+                                });
                             }
                             dragUpload(files, protyle, cellElement);
                         }
diff --git a/app/src/protyle/upload/index.ts b/app/src/protyle/upload/index.ts
index 0925c382e..67ab33161 100644
--- a/app/src/protyle/upload/index.ts
+++ b/app/src/protyle/upload/index.ts
@@ -10,6 +10,8 @@ import {hasClosestBlock} from "../util/hasClosest";
 import {getContenteditableElement} from "../wysiwyg/getBlock";
 import {getTypeByCellElement, updateCellsValue} from "../render/av/cell";
 import {scrollCenter} from "../../util/highlightById";
+import {confirmDialog} from "../../dialog/confirmDialog";
+import prettyBytes from "pretty-bytes";
 
 interface FileWithPath extends File {
     path: string;
@@ -213,53 +215,39 @@ const genUploadedLabel = (responseText: string, protyle: IProtyle) => {
     }, hasImage ? 0 : Constants.TIMEOUT_LOAD);
 };
 
-export const uploadLocalFiles = (files: string[], protyle: IProtyle, isUpload: boolean) => {
-    const msgId = showMessage(window.siyuan.languages.uploading, 0);
-    fetchPost("/api/asset/insertLocalAssets", {
-        assetPaths: files,
-        isUpload,
-        id: protyle.block.rootID
-    }, (response) => {
-        hideMessage(msgId);
-        let tip = "";
-        Object.keys(response.data.succMap).forEach(name => {
-            if (response.data.succMap[name].startsWith("file:")) {
-                tip += name + ", ";
-            }
-        });
-        if (tip) {
-            showMessage(window.siyuan.languages.dndFolderTip.replace("${x}", `<b>${tip.substring(0, tip.length - 2)}</b>`));
+export const uploadLocalFiles = (files: ILocalFiles[], protyle: IProtyle, isUpload: boolean) => {
+    let msg = "";
+    const assetPaths: string[] = [];
+    files.forEach(item => {
+        if (item.size && Constants.SIZE_UPLOAD_TIP_SIZE <= item.size) {
+            msg += window.siyuan.languages.uploadFileTooLarge.replace("${x}", item.path).replace("${y}", prettyBytes(item.size, {binary: true})) + "<br>";
         }
-        genUploadedLabel(JSON.stringify(response), protyle);
+        assetPaths.push(item.path);
+    });
+
+    confirmDialog(msg ? window.siyuan.languages.upload : "", msg, () => {
+        const msgId = showMessage(window.siyuan.languages.uploading, 0);
+        fetchPost("/api/asset/insertLocalAssets", {
+            assetPaths,
+            isUpload,
+            id: protyle.block.rootID
+        }, (response) => {
+            hideMessage(msgId);
+            let tip = "";
+            Object.keys(response.data.succMap).forEach(name => {
+                if (response.data.succMap[name].startsWith("file:")) {
+                    tip += name + ", ";
+                }
+            });
+            if (tip) {
+                showMessage(window.siyuan.languages.dndFolderTip.replace("${x}", `<b>${tip.substring(0, tip.length - 2)}</b>`));
+            }
+            genUploadedLabel(JSON.stringify(response), protyle);
+        });
     });
 };
 
 export const uploadFiles = (protyle: IProtyle, files: FileList | DataTransferItemList | File[], element?: HTMLInputElement, successCB?: (res: string) => void) => {
-    // 文档书中点开属性->数据库后的变更操作
-    if (!protyle) {
-        const formData = new FormData();
-        for (let i = 0, iMax = files.length; i < iMax; i++) {
-            formData.append("file[]", files[i] as File);
-        }
-        const xhr = new XMLHttpRequest();
-        xhr.open("POST", Constants.UPLOAD_ADDRESS);
-        xhr.onreadystatechange = () => {
-            if (xhr.readyState === XMLHttpRequest.DONE) {
-                if (xhr.status === 200) {
-                    successCB(xhr.responseText);
-                } else if (xhr.status === 0) {
-                    showMessage(window.siyuan.languages.fileTypeError);
-                } else {
-                    showMessage(xhr.responseText);
-                }
-                if (element) {
-                    element.value = "";
-                }
-            }
-        };
-        xhr.send(formData);
-        return;
-    }
     // FileList | DataTransferItemList | File[] => File[]
     let fileList = [];
     for (let i = 0; i < files.length; i++) {
@@ -269,7 +257,7 @@ export const uploadFiles = (protyle: IProtyle, files: FileList | DataTransferIte
         }
         if (0 === fileItem.size && "" === fileItem.type && -1 === fileItem.name.indexOf(".")) {
             // 文件夹
-            uploadLocalFiles([(fileItem as FileWithPath).path], protyle, false);
+            uploadLocalFiles([{path: (fileItem as FileWithPath).path, size: null}], protyle, false);
         } else {
             fileList.push(fileItem);
         }
@@ -319,65 +307,71 @@ export const uploadFiles = (protyle: IProtyle, files: FileList | DataTransferIte
     for (const key of Object.keys(extraData)) {
         formData.append(key, extraData[key]);
     }
-
+    let msg = "";
     for (let i = 0, iMax = validateResult.files.length; i < iMax; i++) {
         formData.append(protyle.options.upload.fieldName, validateResult.files[i]);
-    }
-    formData.append("id", protyle.block.rootID);
-    const xhr = new XMLHttpRequest();
-    xhr.open("POST", protyle.options.upload.url);
-    if (protyle.options.upload.token) {
-        xhr.setRequestHeader("X-Upload-Token", protyle.options.upload.token);
-    }
-    if (protyle.options.upload.withCredentials) {
-        xhr.withCredentials = true;
+        if (Constants.SIZE_UPLOAD_TIP_SIZE <= validateResult.files[i].size) {
+            msg += window.siyuan.languages.uploadFileTooLarge.replace("${x}", validateResult.files[i].name).replace("${y}", prettyBytes(validateResult.files[i].size, {binary: true})) + "<br>";
+        }
     }
 
-    protyle.upload.isUploading = true;
-    xhr.onreadystatechange = () => {
-        if (xhr.readyState === XMLHttpRequest.DONE) {
-            protyle.upload.isUploading = false;
-            if (!document.body.contains(protyle.element)) {
-                // 网络较慢时，页签已经关闭
-                destroy(protyle);
+    formData.append("id", protyle.block.rootID);
+    confirmDialog(msg ? window.siyuan.languages.upload : "", msg, () => {
+        const xhr = new XMLHttpRequest();
+        xhr.open("POST", protyle.options.upload.url);
+        if (protyle.options.upload.token) {
+            xhr.setRequestHeader("X-Upload-Token", protyle.options.upload.token);
+        }
+        if (protyle.options.upload.withCredentials) {
+            xhr.withCredentials = true;
+        }
+
+        protyle.upload.isUploading = true;
+        xhr.onreadystatechange = () => {
+            if (xhr.readyState === XMLHttpRequest.DONE) {
+                protyle.upload.isUploading = false;
+                if (!document.body.contains(protyle.element)) {
+                    // 网络较慢时，页签已经关闭
+                    destroy(protyle);
+                    return;
+                }
+                if (xhr.status === 200) {
+                    hideMessage(validateResult.msgId);
+                    if (protyle.options.upload.success) {
+                        protyle.options.upload.success(editorElement, xhr.responseText);
+                    } else if (successCB) {
+                        successCB(xhr.responseText);
+                    } else {
+                        let responseText = xhr.responseText;
+                        if (protyle.options.upload.format) {
+                            responseText = protyle.options.upload.format(files as File [], xhr.responseText);
+                        }
+                        genUploadedLabel(responseText, protyle);
+                    }
+                } else if (xhr.status === 0) {
+                    showMessage(window.siyuan.languages.fileTypeError);
+                } else {
+                    if (protyle.options.upload.error) {
+                        protyle.options.upload.error(xhr.responseText);
+                    } else {
+                        showMessage(xhr.responseText);
+                    }
+                }
+                if (element) {
+                    element.value = "";
+                }
+                protyle.upload.element.style.display = "none";
+            }
+        };
+        xhr.upload.onprogress = (event: ProgressEvent) => {
+            if (!event.lengthComputable) {
                 return;
             }
-            if (xhr.status === 200) {
-                hideMessage(validateResult.msgId);
-                if (protyle.options.upload.success) {
-                    protyle.options.upload.success(editorElement, xhr.responseText);
-                } else if (successCB) {
-                    successCB(xhr.responseText);
-                } else {
-                    let responseText = xhr.responseText;
-                    if (protyle.options.upload.format) {
-                        responseText = protyle.options.upload.format(files as File [], xhr.responseText);
-                    }
-                    genUploadedLabel(responseText, protyle);
-                }
-            } else if (xhr.status === 0) {
-                showMessage(window.siyuan.languages.fileTypeError);
-            } else {
-                if (protyle.options.upload.error) {
-                    protyle.options.upload.error(xhr.responseText);
-                } else {
-                    showMessage(xhr.responseText);
-                }
-            }
-            if (element) {
-                element.value = "";
-            }
-            protyle.upload.element.style.display = "none";
-        }
-    };
-    xhr.upload.onprogress = (event: ProgressEvent) => {
-        if (!event.lengthComputable) {
-            return;
-        }
-        const progress = event.loaded / event.total * 100;
-        protyle.upload.element.style.display = "block";
-        const progressBar = protyle.upload.element;
-        progressBar.style.width = progress + "%";
-    };
-    xhr.send(formData);
+            const progress = event.loaded / event.total * 100;
+            protyle.upload.element.style.display = "block";
+            const progressBar = protyle.upload.element;
+            progressBar.style.width = progress + "%";
+        };
+        xhr.send(formData);
+    });
 };
diff --git a/app/src/protyle/util/compatibility.ts b/app/src/protyle/util/compatibility.ts
index 16d25c6e9..71dfc16ee 100644
--- a/app/src/protyle/util/compatibility.ts
+++ b/app/src/protyle/util/compatibility.ts
@@ -122,13 +122,13 @@ export const readText = () => {
 /// #if !BROWSER
 export const getLocalFiles = async () => {
     // 不再支持 PC 浏览器 https://github.com/siyuan-note/siyuan/issues/7206
-    let localFiles: string[] = [];
+    let localFiles: ILocalFiles[] = [];
     if ("darwin" === window.siyuan.config.system.os) {
         const xmlString = clipboard.read("NSFilenamesPboardType");
         const domParser = new DOMParser();
         const xmlDom = domParser.parseFromString(xmlString, "application/xml");
         Array.from(xmlDom.getElementsByTagName("string")).forEach(item => {
-            localFiles.push(item.childNodes[0].nodeValue);
+            localFiles.push({path: item.childNodes[0].nodeValue, size: null});
         });
     } else {
         const xmlString = await fetchSyncPost("/api/clipboard/readFilePaths", {});
diff --git a/app/src/protyle/util/editorCommonEvent.ts b/app/src/protyle/util/editorCommonEvent.ts
index 1ccc01a61..bf58344cc 100644
--- a/app/src/protyle/util/editorCommonEvent.ts
+++ b/app/src/protyle/util/editorCommonEvent.ts
@@ -1149,9 +1149,12 @@ export const dropEvent = (protyle: IProtyle, editorElement: HTMLElement) => {
             if (!avElement) {
                 focusByRange(getRangeByPoint(event.clientX, event.clientY));
                 if (event.dataTransfer.types[0] === "Files" && !isBrowser()) {
-                    const files: string[] = [];
+                    const files: ILocalFiles[] = [];
                     for (let i = 0; i < event.dataTransfer.files.length; i++) {
-                        files.push(webUtils.getPathForFile(event.dataTransfer.files[i]));
+                        files.push({
+                            path: webUtils.getPathForFile(event.dataTransfer.files[i]),
+                            size: event.dataTransfer.files[i].size
+                        });
                     }
                     uploadLocalFiles(files, protyle, !event.altKey);
                 } else {
@@ -1162,9 +1165,12 @@ export const dropEvent = (protyle: IProtyle, editorElement: HTMLElement) => {
                 const cellElement = hasClosestByClassName(event.target, "av__cell");
                 if (cellElement) {
                     if (getTypeByCellElement(cellElement) === "mAsset" && event.dataTransfer.types[0] === "Files" && !isBrowser()) {
-                        const files: string[] = [];
+                        const files: ILocalFiles[] = [];
                         for (let i = 0; i < event.dataTransfer.files.length; i++) {
-                            files.push(webUtils.getPathForFile(event.dataTransfer.files[i]));
+                            files.push({
+                                path: webUtils.getPathForFile(event.dataTransfer.files[i]),
+                                size: event.dataTransfer.files[i].size
+                            });
                         }
                         dragUpload(files, protyle, cellElement);
                         clearSelect(["cell"], avElement);
diff --git a/app/src/protyle/util/paste.ts b/app/src/protyle/util/paste.ts
index cb59b8a33..b22a11a8a 100644
--- a/app/src/protyle/util/paste.ts
+++ b/app/src/protyle/util/paste.ts
@@ -148,7 +148,7 @@ export const pasteEscaped = async (protyle: IProtyle, nodeElement: Element) => {
 };
 
 export const pasteAsPlainText = async (protyle: IProtyle) => {
-    let localFiles: string[] = [];
+    let localFiles: ILocalFiles[] = [];
     /// #if !BROWSER
     localFiles = await getLocalFiles();
     if (localFiles.length > 0) {
@@ -214,24 +214,24 @@ export const restoreLuteMarkdownSyntax = (protyle: IProtyle) => {
     protyle.lute.SetMark(window.siyuan.config.editor.markdown.inlineMark);
 };
 
-const readLocalFile = async (protyle: IProtyle, localFiles: string[]) => {
+const readLocalFile = async (protyle: IProtyle, localFiles: ILocalFiles[]) => {
     if (protyle && protyle.app && protyle.app.plugins) {
         for (let i = 0; i < protyle.app.plugins.length; i++) {
-            const response: { files: string[] } = await new Promise((resolve) => {
+            const response: { localFiles: ILocalFiles[] } = await new Promise((resolve) => {
                 const emitResult = protyle.app.plugins[i].eventBus.emit("paste", {
                     protyle,
                     resolve,
                     textHTML: "",
                     textPlain: "",
                     siyuanHTML: "",
-                    files: localFiles
+                    localFiles
                 });
                 if (emitResult) {
                     resolve(undefined);
                 }
             });
-            if (response?.files) {
-                localFiles = response.files;
+            if (response?.localFiles) {
+                localFiles = response.localFiles;
             }
         }
     }
@@ -277,7 +277,7 @@ export const paste = async (protyle: IProtyle, event: (ClipboardEvent | DragEven
 
     /// #if !BROWSER
     if (!siyuanHTML && !textHTML && !textPlain && ("clipboardData" in event)) {
-        const localFiles: string[] = await getLocalFiles();
+        const localFiles: ILocalFiles[] = await getLocalFiles();
         if (localFiles.length > 0) {
             readLocalFile(protyle, localFiles);
             return;
diff --git a/app/src/types/index.d.ts b/app/src/types/index.d.ts
index 19b4af116..f7f9045f0 100644
--- a/app/src/types/index.d.ts
+++ b/app/src/types/index.d.ts
@@ -286,12 +286,17 @@ interface Window {
     destroyTheme(): Promise<void>;
 }
 
+interface ILocalFiles {
+    path: string,
+    size: number
+}
+
 interface IClipboardData {
     textHTML?: string,
     textPlain?: string,
     siyuanHTML?: string,
     files?: File[],
-    localFiles?: string[]
+    localFiles?: ILocalFiles[],
 }
 
 interface IRefDefs {